diff options
Diffstat (limited to 'libavcodec/h263dec.c')
| -rw-r--r-- | libavcodec/h263dec.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index 8786679a41..750e3e0fbe 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -3,20 +3,20 @@ * Copyright (c) 2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -271,7 +271,7 @@ static int decode_slice(MpegEncContext *s){ if( s->codec_id==CODEC_ID_MPEG4 && (s->workaround_bugs&FF_BUG_AUTODETECT) && get_bits_left(&s->gb) >=0 - && get_bits_left(&s->gb) < 48 + && get_bits_left(&s->gb) < 137 // && !s->resync_marker && !s->data_partitioning){ @@ -382,6 +382,18 @@ uint64_t time= rdtsc(); retry: + if(s->divx_packed && s->xvid_build>=0 && s->bitstream_buffer_size){ + int i; + for(i=0; i<buf_size-3; i++){ + if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1){ + if(buf[i+3]==0xB0){ + av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n"); + s->bitstream_buffer_size=0; + } + break; + } + } + } if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8); @@ -668,22 +680,18 @@ retry: frame_end: /* divx 5.01+ bistream reorder stuff */ if(s->codec_id==CODEC_ID_MPEG4 && s->divx_packed){ - int current_pos= get_bits_count(&s->gb)>>3; + int current_pos= s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb)>>3); int startcode_found=0; if(buf_size - current_pos > 5){ int i; - for(i=current_pos; i<buf_size-3; i++){ + for(i=current_pos; i<buf_size-4; i++){ if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){ - startcode_found=1; + startcode_found=!(buf[i+4]&0x40); break; } } } - if(s->gb.buffer == s->bitstream_buffer && buf_size>7 && s->xvid_build>=0){ //xvid style - startcode_found=1; - current_pos=0; - } if(startcode_found){ av_fast_malloc( |